<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <div id="app">
        <div>
            <span>姓名:</span>
            <input type="text" v-model="name"/>
        </div>
        <div>
            <span>年龄:</span>
            <input type="number" v-model="age"/>
        </div>
        <div>
            <span>性别:</span>
            <select v-model="gender">
                <option value="男">男</option>
                <option value="女">女</option>
            </select>
        </div>
        <div>
            <button @click="add">{{isEdit ? '修改' : '添加'}}</button>
        </div>
        <div>
            <table border="1" cellpadding="10" cellspacing="0" v-if="list.length > 0">
                <tr>
                    <th>序号</th>
                    <th>姓名</th>
                    <th>年龄</th>
                    <th>性别</th>
                    <th>操作</th>
                </tr>
                <tr v-for="(item,index) in list">
                    <td>{{index + 1}}</td>
                    <td>{{item.name}}</td>
                    <td>{{item.age}}</td>
                    <td>{{item.gender}}</td>
                    <td>
                        <button @click="del(item.id)">删除</button>
                        <button @click="edit(item.id)">编辑</button>
                    </td>
                </tr>
            </table>
        </div>
    </div>
    <script src="../vue.js"></script>
    <script>
        const app = new Vue({
            el: '#app',
            data: {
                editId:'',
                name:'',
                age:'',
                gender:'男',
                isEdit:false,
                list:[
                    { id: 1, name: '小明', age: 18, gender: '男' },
                    { id: 2, name: '小红', age: 20, gender: '女' },
                    { id: 3, name: '小红', age: 20, gender: '女' }
                ]
            },
            methods:{
                add() {
                    if(!this.name.trim() || !this.age.trim()) return alert('不能为空')
                    if (this.isEdit) {
                        if (this.editId) {
                            this.list.forEach(item => {
                                if (item.id === this.editId) {
                                    item.age = this.age
                                    item.name = this.name
                                    item.gender = this.gender
                                }
                            });
                            
                        }
                        this.isEdit = false

                    } else {
                        this.list.push({
                            id: +new Date,
                            name: this.name,
                            age: this.age,
                            gender: this.gender
                        })
                        
                    }
                    this.name = ''
                    this.age = ''
                    this.gender = '男'
                },
                del(id) {
                    if (this.isEdit) {
                        return alert('正在编辑，不可删除')
                    }
                    this.list = this.list.filter(item => item.id != id)
                },
                edit(id) {
                    const item = this.list.find(item => item.id == id)
                    this.name = item.name
                    this.age = item.age
                    this.gender = item.gender
                    this.editId = id
                    this.isEdit = true
                }
            }
        })
    </script>
</body>

</html>